Samsung RFG298AA Service Manual page 76

TROUBLESHOOTING
11) If Tank Water Heater has trouble
ERROR Code
Measure the resistance
between ⑥(3)-⑩(7) after
CN79 connector open 72ohm ± 7%
Initial
power On Heater off
MICOM
#6
3.5V ~
condition
4.8V
※ It could changed HEATER capacity by operation
☞ Checking method of Tank Water Heater
resistance CN79#6(Pink) ↔ #10(White)
** ∞Ω: Open(wire disconnection, heater
disconnection) trouble / 0Ω: Short trouble
Working
heater
3.5V ~
0V
4.8V
Start Start
NO
Is MAIN PCB connector
(CN79) inserted correctly?
YES YES
NO
Is Tank Water Heater
normal?(about72ohm)
YES YES
NO
Is the input voltage of
IC01 MICOM #6 normal?
YES YES
Normal(recheck)
75
Bad contact of connector/ insert correctly
1) Wire connector
2) Replace Heater
1) Recheck the wire
2) Replace PCB MAIN